{"id":16721,"date":"2021-01-20T18:35:40","date_gmt":"2021-01-20T18:35:40","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=16721"},"modified":"2021-01-20T18:35:40","modified_gmt":"2021-01-20T18:35:40","slug":"new-research-creates-chicken-embryos-with-dinosaur-like-faces","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/ro\/science\/biology\/new-research-creates-chicken-embryos-with-dinosaur-like-faces\/","title":{"rendered":"Noi cercet\u0103ri: embrioni de pui cu fe\u021be de dinozaur"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Noi cercet\u0103ri creeaz\u0103 embrioni de pui cu fe\u021be de dinozaur<\/h2>\n\n<h2 class=\"wp-block-heading\">\u00cen\u021belegerea evolu\u021biei p\u0103s\u0103rilor<\/h2>\n\n<p>Oamenii de \u0219tiin\u021b\u0103 au fost fascina\u021bi de mult timp de evolu\u021bia p\u0103s\u0103rilor din dinozauri. Una dintre cele mai distinctive tr\u0103s\u0103turi ale p\u0103s\u0103rilor este ciocul lor, care este foarte diferit de boturile str\u0103mo\u0219ilor lor dinozauri. Un nou studiu a f\u0103cut lumin\u0103 asupra modului \u00een care s-ar fi putut produce aceast\u0103 tranzi\u021bie.<\/p>\n\n<h2 class=\"wp-block-heading\">Tranzi\u021bia de la bot la cioc<\/h2>\n\n<p>Studiul, publicat \u00een revista Evolution, s-a concentrat pe dezvoltarea ciocurilor la embrioni de pui. Cercet\u0103torii au comparat dezvoltarea embrionar\u0103 a ciocurilor la pui \u0219i emu cu dezvoltarea botului la aligatori, \u0219op\u00e2rle \u0219i \u021bestoase. Au descoperit c\u0103 dou\u0103 proteine, numite FGF \u0219i Wnt, joac\u0103 un rol cheie \u00een dezvoltarea ciocului.<\/p>\n\n<p>La reptile, FGF \u0219i Wnt sunt activate \u00een dou\u0103 p\u0103r\u021bi mici ale fe\u021bei embrionare. La p\u0103s\u0103ri, totu\u0219i, aceste proteine sunt activate \u00eentr-o band\u0103 mare de \u021besut \u00een aceea\u0219i zon\u0103. Aceast\u0103 diferen\u021b\u0103 \u00een activitatea proteinelor duce la dezvoltarea unui cioc \u00een loc de un bot.<\/p>\n\n<h2 class=\"wp-block-heading\">Crearea de boti\u021be asem\u0103n\u0103toare dinozaurilor<\/h2>\n\n<p>Pentru a-\u0219i testa ipoteza, cercet\u0103torii au blocat banda larg\u0103 de activitate a proteinelor \u00een embrioni de pui, restric\u021bion\u00e2nd FGF \u0219i Wnt la cele dou\u0103 locuri observate la reptile. Rezultatul a fost embrioni cu oase mai scurte \u0219i mai rotunjite \u00een zona ciocului, similar cu boti\u021bele dinozaurilor.<\/p>\n\n<h2 class=\"wp-block-heading\">Implica\u021bii pentru evolu\u021bia p\u0103s\u0103rilor<\/h2>\n\n<p>Rezultatele acestui studiu ofer\u0103 noi perspective asupra evolu\u021biei p\u0103s\u0103rilor din dinozauri. Ele sugereaz\u0103 c\u0103 ciocul este o adaptare unic\u0103, evoluat\u0103 din cauza diferitelor indicii de dezvoltare necesare pentru a forma un cioc \u00een compara\u021bie cu un bot.<\/p>\n\n<h2 class=\"wp-block-heading\">Considera\u021bii etice<\/h2>\n\n<p>De\u0219i studiul nu a creat hibrizi viabili dino-pui, acesta ridic\u0103 \u00eentreb\u0103ri etice cu privire la poten\u021bialul de a manipula dezvoltarea embrionar\u0103 pentru a crea animale cu tr\u0103s\u0103turi din diferite specii. Cercet\u0103torii subliniaz\u0103 necesitatea de a lua \u00een considerare cu aten\u021bie implica\u021biile etice ale unor astfel de cercet\u0103ri \u00eenainte de a proceda mai departe.<\/p>\n\n<h2 class=\"wp-block-heading\">Cercet\u0103ri suplimentare<\/h2>\n\n<p>Cercet\u0103torii pl\u0103nuiesc s\u0103-\u0219i continue activitatea pentru a \u00een\u021belege mai bine mecanismele genetice \u0219i de dezvoltare care au dus la evolu\u021bia ciocurilor la p\u0103s\u0103ri. De asemenea, sper\u0103 s\u0103 exploreze poten\u021bialele aplica\u021bii ale descoperirilor lor \u00een alte domenii ale biologiei, cum ar fi medicina regenerativ\u0103.<\/p>\n\n<h2 class=\"wp-block-heading\">Lecturi suplimentare<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.nature.com\/articles\/d41586-019-02230-3\" rel=\"nofollow noopener\" target=\"_blank\">Cum au ob\u021binut p\u0103s\u0103rile ciocurile<\/a><\/li>\n<li><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1095927315000631\" rel=\"nofollow noopener\" target=\"_blank\">Ce este un cioc?<\/a><\/li>\n<li><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6315054\/\" rel=\"nofollow noopener\" target=\"_blank\">Cum se blocheaz\u0103 banda larg\u0103 de activitate a proteinelor<\/a><\/li>\n<li><a href=\"https:\/\/evolution.berkeley.edu\/evolibrary\/article\/0_0_0\/evo_24\" rel=\"nofollow noopener\" target=\"_blank\">De ce ciocurile sunt modelate de evolu\u021bie<\/a><\/li>\n<li><a href=\"https:\/\/www.nationalgeographic.com\/animals\/article\/scientists-create-chicken-embryos-dinosaur-faces\" rel=\"nofollow noopener\" target=\"_blank\">Cum s\u0103 creezi hibrizi dino-pui<\/a><\/li>\n<li><a href=\"https:\/\/theconversation.com\/scientists-create-chicken-embryos-with-dinosaur-faces-what-does-it-mean-for-ethics-120558\" rel=\"nofollow noopener\" target=\"_blank\">Considera\u021bii etice privind \u00eentoarcerea ceasului de pas\u0103re<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Noi cercet\u0103ri creeaz\u0103 embrioni de pui cu fe\u021be de dinozaur \u00cen\u021belegerea evolu\u021biei p\u0103s\u0103rilor Oamenii de \u0219tiin\u021b\u0103 au fost fascina\u021bi de mult timp de evolu\u021bia p\u0103s\u0103rilor din dinozauri. Una dintre cele&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[288],"tags":[22122,1381,136,22123,188,137],"class_list":["post-16721","post","type-post","status-publish","format-standard","hentry","category-biology","tag-chicken-embryos","tag-bird-evolution","tag-evolution","tag-dinosaur-faces","tag-genetics","tag-paleontology"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/16721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/comments?post=16721"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/16721\/revisions"}],"predecessor-version":[{"id":16722,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/16721\/revisions\/16722"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media?parent=16721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/categories?post=16721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/tags?post=16721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}